Journal of Electrical Engineering and Technology

The Korean Institute of Electrical Engineers (대한전기학회)
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Fast Voltage-Balancing Scheme for a Carrier-Based Modulation in Three-Phase and Single-Phase NPC Three-Level Inverters

  • Chen, Xi (School of Electrical and Electronic Engineering, Huazhong University of Science and Technology) ;
  • Huang, Shenghua (School of Electrical and Electronic Engineering, Huazhong University of Science and Technology) ;
  • Jiang, Dong (School of Electrical and Electronic Engineering, Huazhong University of Science and Technology) ;
  • Li, Bingzhang (School of Electrical and Electronic Engineering, Huazhong University of Science and Technology)
  • Received : 2018.01.16
  • Accepted : 2018.05.12
  • Published : 2018.09.01
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Abstract

In this paper, a novel neutral-point voltage balancing scheme for NPC three-level inverters using carrier-based sinusoidal pulse width modulation (SPWM) method is developed. The new modulation approach, based on the obtained expressions of zero sequence voltage in all six sectors, can significantly suppress the low-frequency voltage oscillation in the neutral point at high modulation index and achieve a fast voltage-balancing dynamic performance. The implementation of the proposed method is very simple. Another attractive feature is that the scheme can stably control any voltage difference between the two dc-link capacitors within a certain range without using any extra hardware. Furthermore, the presented scheme is also applicable to the single-phase NPC three-level inverter. It can maintain the neutral-point voltage balance at full modulation index and improve the voltage-balancing dynamic performance of the single-phase NPC three-level inverter. The performance of the proposed strategy and its benefits over other previous techniques are verified experimentally.

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References

  1. A. Nabae, I. Takahashi, and H. Akagi, "A new neutral-point-clamped PWM inverter," IEEE Trans. Ind. Appl., vol. IA-17, no. 5, pp. 518-523, Sept. 1981. https://doi.org/10.1109/TIA.1981.4503992
  2. J. Li, A. Q. Huang, Z. Liang, and S. Bhattacharya, "Analysis and design of active NPC (ANPC) inverters for fault-tolerant operation of high-power electrical drives," IEEE Trans. Power Electron., vol. 27, no. 2, pp. 519-533, Feb. 2012. https://doi.org/10.1109/TPEL.2011.2143430
  3. V. Yaramasu and B. Wu, "Predictive control of a three-level boost converter and an NPC inverter for high-power PMSG-based medium voltage wind energy conversion systems," IEEE Trans. Power Electron., vol. 29, no. 10, pp. 5308-5322, Oct. 2014. https://doi.org/10.1109/TPEL.2013.2292068
  4. Y. Jiao, F. C. Lee, and S. Lu, "Space vector modulation for three-level NPC converter with neutral point voltage balance and switching loss reduction," IEEE Trans. Power Electron., vol. 29, no. 10, pp. 5579-5591, Oct. 2014. https://doi.org/10.1109/TPEL.2013.2294274
  5. J. Rodriguez, S. Bernet, P. K. Steimer, and I. E. Lizama, "A survey on neutral-point-clamped inverters," IEEE Trans. Ind. Electron., vol. 57, no. 7, pp. 2219-2230, Jul. 2010. https://doi.org/10.1109/TIE.2009.2032430
  6. F. Wang, "Sine-triangle versus space-vector modulation for three-level PWM voltage-source inverters," IEEE Trans. Ind. Appl., vol. 38, no. 2, pp. 500-506, Mar./Apr. 2002. https://doi.org/10.1109/28.993172
  7. G. I. Orfanoudakis, M. A. Yuratich, and S. M. Sharkh, "Nearest-vector modulation strategies with minimum amplitude of low-frequency neutral-point voltage oscillations for the neutral-point-clamped converter," IEEE Trans. Power Electron., vol. 28, no. 10, pp. 4485-4499, Oct. 2013. https://doi.org/10.1109/TPEL.2012.2236686
  8. U. M. Choi, J. S. Lee, and K. B. Lee, "New modulation strategy to balance the neutral-point voltage for three-level neutral-clamped inverter systems," IEEE Trans. Energy Convers., vol. 29, no. 1, pp. 91-100, Mar. 2014. https://doi.org/10.1109/TEC.2013.2293502
  9. J. S. Lee and K. B. Lee, "New modulation techniques for a leakage current reduction and a neutral-point voltage balance in transformerless photovoltaic systems using a three-level inverter," IEEE Trans. Power Electron., vol. 29, no. 4, pp. 1720-1732, Apr. 2014. https://doi.org/10.1109/TPEL.2013.2264954
  10. U. M. Choi, F. Blaabjerg, and K. B. Lee, "Method to minimize the low-frequency neutral-point voltage oscillations with time-offset injection for neutral-point-clamped inverters," IEEE Trans. Ind. Appl., vol. 51, no. 2, pp. 1678-1691, Mar./Apr. 2015. https://doi.org/10.1109/TIA.2014.2350079
  11. S. Gui, Z. Lin, and S. Huang, "A varied VSVM strategy for balancing the neutral-point voltage of DC-link capacitors in three-level NPC converters," Energies, vol. 8, no. 3, pp. 2032-2047, Mar. 2015. https://doi.org/10.3390/en8032032
  12. A. Choudhury, P. Pillay, and S. S. Williamson, "Modified DC-bus voltage-balancing algorithm based three-level neutral-point-clamped IPMSM drive for electric vehicle applications," IEEE Trans. Ind. Electron., vol. 63, no. 2, pp. 761-772, Feb. 2016. https://doi.org/10.1109/TIE.2015.2478392
  13. X. Li, S. Dusmez, B. Akin, and K. Rajashekara, "A new SVPWM for the phase current reconstruction of three-phase three-level T-type converters," IEEE Trans. Power Electron., vol. 31, no. 3, pp. 2627-2637, Mar. 2016. https://doi.org/10.1109/TPEL.2015.2440421
  14. S. Ogasawara and H. Akagi, "Analysis of variation of neutral point potential in neutral-point-clamped voltage source PWM inverters," Industry Applications Society Annual Meeting, pp. 965-970, Oct. 1993.
  15. Q. Song, W. Liu, Q. Yu, X. Xie, and Z. Wang, "A neutral-point potential balancing algorithm for three-level NPC inverters using analytically injected zero-sequence voltage," Applied Power Electronics Conference and Exposition, pp. 228-233, Feb. 2003.
  16. J. Zaragoza, J. Pou, S. Ceballos, E. Robles, C. Jaen, and M. Corbalan, "Voltage-balance compensator for a carrier-based modulation in the neutral-point-clamped converter," IEEE Trans. Ind. Electron., vol. 56, no. 2, pp. 305-314, Feb. 2009. https://doi.org/10.1109/TIE.2008.2009195
  17. J. Zaragoza, J. Pou, S. Ceballos, E. Robles, P. Ibanez, and J. L. Villate, "A comprehensive study of a hybrid modulation technique for the neutral-point-clamped converter," IEEE Trans. Ind. Electron., vol. 56, no. 2, pp. 294-304, Feb. 2009. https://doi.org/10.1109/TIE.2008.2005132
  18. C. Wang and Y. Li, "Analysis and calculation of zero-sequence voltage considering neutral-point potential balancing in three-level NPC converters," IEEE Trans. Ind. Electron., vol. 57, no. 7, pp. 2262-2271, Jul. 2010. https://doi.org/10.1109/TIE.2009.2024093
  19. R. Maheshwari, S. Munk-Nielsen, and S. Busquets-Monge, "Design of neutral-point voltage controller of a three-level NPC inverter with small DC-link capacitors," IEEE Trans. Ind. Electron., vol. 60, no. 5, pp. 1861-1871, May 2013. https://doi.org/10.1109/TIE.2012.2202352
  20. W. Srirattanawichaikul, S. Premrudeepreechacharn, and Y. Kumsuwan, "Modified unipolar carrier-based PWM strategy for three-level neutral-point-clamped voltage source inverters," J. Electr. Eng. Technol., vol. 9, no. 2, pp. 489-500, Mar. 2014. https://doi.org/10.5370/JEET.2014.9.2.489
  21. J. S. Lee and K. B. Lee, "Time-offset injection method for neutral-point AC ripple voltage reduction in a three-level inverter," IEEE Trans. Power Electron., vol. 31, no. 3, pp. 1931-1941, Mar. 2016. https://doi.org/10.1109/TPEL.2015.2439689
  22. I. Lopez, S. Ceballos, J. Pou, J. Zaragoza, J. Andreu, I. Kortabarria, and V. G. Agelidis, "Modulation strategy for multiphase neutral-point-clamped converters," IEEE Trans. Power Electron., vol. 31, no. 2, pp. 928-941, Feb. 2016. https://doi.org/10.1109/TPEL.2015.2416911
  23. K. S. Ahn, N. S. Choi, E. C. Lee, and H. J. Kim, "A study on a carrier based PWM having constant common mode voltage and minimized switching frequency in three-level inverter," J. Electr. Eng. Technol., vol. 11, no. 2, pp. 393-404, Mar. 2016. https://doi.org/10.5370/JEET.2016.11.2.393
  24. Z. Wang, F. Cui, G. Zhang, T. Shi, and C. Xia, "Novel carrier-based PWM strategy with zero-sequence voltage injected for three-level NPC inverter," IEEE J. Emerg. Sel. Topics Power Electron., vol. 4, no. 4, pp. 1442-1451, Dec. 2016. https://doi.org/10.1109/JESTPE.2016.2591618
  25. W. Jiang, Y. Gao, J. Wang, and L. Wang, "A hybrid modulation strategy with reduced switching losses and neutral point potential balance for three-level NPC inverter," J. Electr. Eng. Technol., vol. 12, no. 2, pp. 738-750, Mar. 2017. https://doi.org/10.5370/JEET.2017.12.2.738
  26. G. Yan, S. Duan, S. Zhao, G. Li, W. Wu, and H. Li, "Research on the mechanism of neutral-point voltage fluctuation and capacitor voltage balancing control strategy of three-phase three-level T-type inverter," J. Electr. Eng. Technol., vol. 12, no. 6, pp. 2227-2236, Nov. 2017. https://doi.org/10.5370/JEET.2017.12.6.2227
  27. M. C. Sousounis, J. K. H. Shek, and M. A. Mueller, "Filter design for cable overvoltage and power loss minimization in a tidal energy system with onshore converters," IEEE Trans. Sustain. Energy, vol. 7, no. 1, pp. 400-408, Jan. 2016. https://doi.org/10.1109/TSTE.2015.2424258
  28. Y. Jiang, W. Wu, Y. He, H. S. H. Chung, and F. Blaabjerg, "New passive filter design method for overvoltage suppression and bearing currents mitigation in a long cable based PWM inverter-fed motor drive system," IEEE Trans. Power Electron., vol. 32, no. 10, pp. 7882-7893, Oct. 2017. https://doi.org/10.1109/TPEL.2016.2639024
  29. W. Song, X. Feng, and K. M. Smedley, "A carrier-based PWM strategy with the offset voltage injection for single-phase three-level neutral-point-clamped converters," IEEE Trans. Power Electron., vol. 28, no. 3, pp. 1083-1095, Mar. 2013. https://doi.org/10.1109/TPEL.2012.2210248
  30. Z. Zhang, Y. Xie, J. Le, and L. Chen, "Study of SVPWM method for single-phase three-level diode-clamped inverter," Proceedings of the CSEE, vol. 30, no. 27, pp. 62-68, Sep. 2010.